Added countdown timer to loading page — progress bar with sweep ETA

scripts/clean.mjs

@@ -0,0 +1,18 @@
+import { rm, access } from 'fs/promises';
+import { join } from 'path';
+
+const targets = [
+  'runs/latest.json',
+  'runs/memory',
+];
+
+for (const target of targets) {
+  const full = join(process.cwd(), target);
+  try {
+    await access(full);
+    await rm(full, { recursive: true });
+    console.log(`removed: ${target}`);
+  } catch {
+    // not found — skip silently
+  }
+}